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Literature
- F. Seck (Hrsg.): William sending pool of broadcasting corporations 1592-1635, astronomer, geographer, Orientalist, inventor of the calculating machine, 1978
- Ernst Martin: The calculating machine and its history of the development - calculating machines with automatic decimal transmission. 1. Volume, 1. Edition, 1925
- Hen man, A., [D. i. Adolf Schranz]: The technical development of the calculating machine, Aachen: Peter Basten, 1952.
- Schranz, Adolf G.: Adding machines - once and now, Aachen: Peter Basten, 1952
- Spring, K. [Karl]: The calculating machines and the machine counting, Leipzig and Berlin: B.G. Teubner, 1915
- Reese, Martin: New one of views of old machines. Publishing house Dr. Kovac, Hamburg 2002. ISBN 3-8300-0533-4
- Meyer to the Capellen, W.: Mathematical instruments - mathematics and their applications in physics and technology, Leipzig: Geest & Portig K. - G., 1949